Louis Brennan: inventor of the world’s first practical guided missile and the gyroscopic monorail. Photograph: Getty

On Tuesday, in his birthplace of Castlebar, Co Mayo, a plaque will be unveiled to Louis Brennan, an Irish-Australian mechanical engineer and th(...)

Enda Kenny at the graveside of Louis Brennan in London today. Photograph: Mark Hennessy

Taoiseach Enda Kenny has honoured the Mayo-born inventor of the torpedo, Louis Brennan, who has lain in an unmarked grave in London for 80 year(...)